Pulverizing-mill.



H. U. PRINDLE.

PuLvEmzlNG Mm.

APPLICATION FILED NOV. 25, |9|4 L, Patented Oct. 26, 1915.

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H. U. PRINDLE.

PULVERIZING MILL.

APPLICATION FILED Nov. 25, I9I4.

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Arm/INV@ H. u. PRINDLE.

PULVEHIZING MILL.

APPLICATION FILED NOV. 25, i914.

Lll. Patented '00L 26, 1915.

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COLUMBIA PLANQGRAPH CLL, WASHINGTON, l.)4 c.

HENRY URSON PRINDLE, 0F OAKLAND, CALIFORNIA.

PLVERIZINe-MILL.

LISRSS.

Application led November 25, 1914. Y Serial N o. 873,937.

i7 10 all whom it may concern:

Be it known that I, HENRY UnsoN PRINDLE, residing at Oakland, in the county of Alameda and State ofCalifornia, have invented certain new and useful Improvements in Pulverizing-Mills, of which the following is ay specification.

My present invention relates to improvements in that type of crushing or pulverizing means, in which the crushing or pulverizing elements are caused to revolve or roll upon a base about a vertical axis and which operate under a planetary movement.

My presentA invention, which in its generic nature includes an improved stationary gear and crushing or pulverizing elements held to rotate with a shaft that coperates with and is operated to revolve about the stationary gear, more particularly has for its object to provide a machine of the general character stated of a compact, economical and effective construction in which the pulverizing or crushing members are so arranged that they cover absolutely every portion of the surface of the pan or bowl within which they operate.

Another object of my invention is to produce certain improved features in pulverizing machines of the general type stated, whereby to provide for a much larger output in proportion to the size of the machine than has heretofore been found possible in this class of pulverizing or crushing mechanisms.

Another and importantobject of my present invention is to provide an improved cooperative arrangement of a pan or bowl and crushing and pulverizing elements, so arranged to thereby readily adapt the machine for either dry or wet pulverizing.

Furthermore iy present invention has for its purpose the provision of a pulverizing machine having the crushing or pulverizing elements operable under a. planetary motion,

in which the construction is simple and composed of but few working parts, in which all of the mechanism, excepting the crushing and pulverizing elements, are inclosed within the upper part of the machine and so incased that the same is protected from dust and water.

Vith other objects in View, that will be hereinafter explained, my present invention embodies the peculiar construction and novel arrangement of parts, all of which will be hereinafter Specification of Letters Patent.

full-1J explained, specifically f Patented Uct. 26, i915.

pointed out in the appended claims, and illustrated in the accompanying drawings, 1n which:

p Figure l is a perspective view of my improved pulverizing mill,` several of the splashplates being removed. Fig. 2 is a vertical cross sectionv thereof. Fig. 3 is a topplan view, the gears being diagrammatically indicated and the top or cover plate omitted.` Fig. tis a perspective view of my machine showing the main drive gear, the driving pinion and the main driving shaft, the splash plates being omitted. Fig; 5 is aV plan view of one set of pulverizing rollers and the carrying heads therefor. Fig. 6 is alongitudinal section thereof taken on the line 6 6 of Fig. 5. Fig. 7 is a cross section thereof on the line 7-7 on Fig. 6 vand illustrating, in detail, vthe driving yoke and its spring or cushion bearing connections with the roller carrying head. Fig. 8 is an enlarged detail section of a portion of the pan, one ofthe screens, the means for attaching thesaid screen to the pan, and the splash plate thatl coperates therewith. Fig.. 9 is a detail perspectiveA view of one of the, screens. Fig. 10 is a diagrammatic elevation showing a modified structure hereinafter referred to. Fig. ll is a detail section that illustrates a modified means for driving the walking. pinionshereinafter referred to.

In the present showing of my pulverizing mill, the pan or bowl portion thereof is constructed for. adapting the machine for wet pulverizing and for such purpose I provide a shallow pan l formed with a hopper or pouring throat 2 and With a plurality of screened side openings 3, hereinafter referred to, andA for. gathering the splashings, a base trought is cast or otherwise fiXedly joined to the bottom vof the pan, which extends entirely around the pan and gradually inclines downwardly from the hopper side to a discharging mouth or eX- tension 5, (as is best shown in Fig. l).

.The upper edge of the pan has a bearing rim 6upon which is removably mounted a cover` 7of inverted dished shape, the lower edge of which terminates in an annular flange 8 for receiving the screw bolts 9 that secure the cover to the pan flange, the latter` having threadedsockets for the screws 9, as shown.

The pan 1 has supporting legs 10 suitably mounted on foundation brace members l1 upon which, in suitable bearings 12, is

mounted a main driving shaft 13 that has the usual fast and loose pulleys 14 and 15 and Whose inner en d extends under the pan and is provided with a driving pinion 16.

The pinion 16 meshes With and transmits motion to a master bevel gear 17 that is keyed upon the .lower end of a vertical shaft 18 `which extends upwardly, centrally of the pan, and has its upper end journaled in a hub portion 19 of a horizontally disposed gear 20, and the said portion fits within a central tubular bearing 26a in the'spider frame 26, presently again referred to.

22 designates the top` member of the cover 7 and the same is provided With a central hub-like portion 22a that forms a socket for an. inverted lubricant holder that is held in place bya cap member 23 mounted upon the portion 22a 4and securedv to the same by screws, as clearly shown in Fig. 2.

A tubular center post 24 extends up' from thebottom of the pan, and it has a stepped lower end for seating in the pendent hub 25 of the pan bottom, to which it is made fast by a set screw 25a. f

r1`he upper end of thepost 24 forms a central support or bearing for the revolving head 29 in thenature of a solid plate thatl forms a bottom'rclosure for a chamber X formed in the cover member and in Which thetransmitting mechanism, that actuates the crushing and pulverizing elements, is mounted.

26 designates a spider frame that is fixedly mounted on the revolving head and Which includes a seriesrof upper radial or spider arms 27, the general arrangement of which is best shown in Fig. 3.

The revolving head includes an annular bearing surface on lts upper face near the peripheral edge thereof, `which engages kWith an annular'iiange 31, that projects inwardly from the inclined side Wall of the Tcover, it being integral with, or otherwise made fast to the said Wall. and'lubricated by suitable means, as shown.

It will be noticed by referring to Fig. 2, that the hub portion of the revolving head has a pendent flange 29al that overlaps a verf tically extended annular flange 24 on the upper end of the tubular post 24, and the outer or rim edge of the head 29 is formed With an upturned annular rim 29b that extends in a plane above the bearing surface 30 of the head and the similar rim 31, on the inside of the removable top or cover, such construction of parts Ybeing provided for.

32-32, with bushings 32, and these register With like spaced apertures 33 in the revolving head 29, and have bushings 33".

A shaft 34 is journaled in each set of alining apertures 32-33, and the Said shafts 34 which 1 hereinafter term the roller head shafts, each have ixedly attached thereto a walking pinion 35 that meshes with the fixedly held gear 20 and a supplemental gear 36 that meshes with and receives motion from a driving gear 37 keyed upon the shaft 18.

By reason of arranging the driving means and connecting the roller head shafts, therewith in the manner hereinbefore described and shown in the drawings, it will be readily understood, by those skilled in the art to which my invention relates, that as power is applied to the shaft 18, the driving gear 37 thereon transmits rotary motion, through gears 36, to the roller head shafts 34 and at the same time, by reason of the walking pinions 35 engaging the stationary gears 20, causes the revolving head, with the spider frame and the revolving head, to travel around the central shaft 18 and thereby impart, as it were, a planetary motion to the roller head shafts 34 and the pulverizing elements carried thereby, and presently more fully explained.

One of the essential features of my present invention lies in the manner in which the pulverizing means are constructed and their connection With the shaft 34. 1n the present showing, the crushing or pulverizing elements are in the nature of two'rollers carried upon a yoke or head frame, which is connected to its operating shaft 34 in a, manner to permit its being quickly disconnected from the said shaft 34, when so desired. Each yoke or head frame carries a pair of crushing or pulveriziug rollers and each of the said heads also includes a central or yoke member that has a central socket 38, of non-circular shape, preferably shaped as shown, for receiving the like shaped pendent or shank portion 39 of a saddle 39a, Which in turn receives the shaft 34, the connection of the shank with the yoke being such as to provide for a rigid and interlocked engagement of the yoke and the shaft 34.

For taking up shocks, and to avoid breaking the parts, the crushing and pulverizing rollers are so mounted that they have a limited vertically yieldable motion, and for such purpose the saddle members 39a include lateral extensions 40--40, each of which has a pendent collar 41-41 for seating upon a cushion or dash spring 42, mounted in the deep sockets 42a formed in the opposite sides of a head casting 43, that is transversely apertured as at 44, for receiving the adjacent ends of the stub shafts 45, each of which carries one of the crushing or pulverizing rollers before referred to. In the construction shown, each shaft 45 includes an enlarged `spindle upon which travel roller bearings 46'46, suitably held in position by rings 47, and upon which the pulverizing rollers 48 are rotatably mounted, as is clearly shown in Fig. 6, by reference to which it will be also noticed the rollers 48 include wearing rings or tires`49 having internal tapered faces 50 for coengaging the like shaped outer faces of the roller body proper.

The rollers 48 and their tires or Wearing rings 49 are held in proper position, relatively to each other, and upon their respective spindles, by the inner clamping ring 51 and an outer clamping disk 52, said disk and ring being secured by bolts 53 that passV through the roller body, as shown.

Wearing plates 54 are secured in the bottom of the pan over which the rollers travel and the said plates are held from creeping by the dowel pins 55, that join with the plates and the pan bottom, as shown.

By utilizing a pair of rollers 48, arranged as shown, as the crushing or pulverizing elements and imparting motion thereto in the manner hereinbefore described, the action of the rollers on the material being treated, is such that they practically cover every portion of the grinding or crushing surface on the bottom of the pan. Since the rollers, under`- pressure, revolve on their own axes, the planetary motion imparted to them gives the said rollers a progressive movement, and at the same time rotating them around the roller shaft in a circle egual to one-half the diameter of the pan. The progressive movement imparted to the rollers 48 causes the said rollers to side slip when describing an arc at right angles to the arc of the pan, thereby effecting a side rubbing action at the same time the crushing operation is being effected.

As hereinbefore mentioned, my present type of machine is especially adapted for wet pulverizing and to that end screens are mounted over each of the openings in the sides of the pan except at the hopper or inlet throat. These screens 60, one of which is shown in detail (see Fig. 9) are adapted for being slidably moved into side grooves or recesses 6l formed on the outside of the pan wall adjacent the screening openings, and are firmly held in position by the wedge members 62, and for catching up the splashings through the screens during the operation of pulverizing and crushing galvanized iron splash plates 63 are hung over the screens, and have their lower ends projected down into the trough or gutter that passes around the pan, the said plates having strap portions G4 for conveniently suspending them from the upper edge of the screen frames.

By providing the screens and the splash plates, as shown and described, it is obvious that there can be little or no waste fly out through the screens, which hold back the solids to be finally crushed or pulverized, and such of the slime or fluid that is projected through the screens is deflected into the catching trough before mentioned.

For mining work, amalgamating pockets can be formed in the pan bottom, to suit the requirements. In the drawing, (see Fig. 2) I have shown the bottom of the pan formed with an annular gutter or pocket 67 in which the solids are readily collected and from which they may be readily drawn ofi through the plugged outlets 68.

The detailed arrangement of the operative parts, as shown in the drawing, show a practical and preferred construction of my present improved pulverizing mill. The details of construction, as shown, may, however, be readily modiiied or varied to suit the special requirements for which my mill may be constructed. For example, the top in which the gear or power transmission mechanism is incased need not be mounted on the pan, but especially when working dry stuff, it may be supported above the top of the pan (see Fig. l0) to allow for the free escape of the dust, it being. understood that since the revolving head forms a positive bottom closure for the chamber X, that little or no dust or water splashings can pass up among the gearing.

Instead of driving the walking pinions 35 by a special gear 20, as shown in Fig. 2, the said pinions 35 may be driven by an internal master gear 75 integral with the member 7 and arranged in the manner shown in Fig. 11.

What I claim is:

1. In a pulverizing mill of the character described, a pan having a receiving hopper at one side and an annular collecting trough that surrounds the bottom of the pan and discharges at the other side thereof, the said pan having` at least one screened outlet in its side wall, a splash plate over the said outlet for directing the splashings into the collecting trough, said splash plate including an upper bent end to hook over the respective screen and means for holding said plate' against lateral displacement, a shaft verti` cally mounted in the center of the pan, and pulverizing mechanism within the said pan, operative from the said shaft.

2. In a pulverizing mill of the character described, the combination with a pan, a hollow post that rises centrally from the bottom of the pan; of a power shaft jonrnaled in the center post, an inverted dished shaped cover mounted over the pan, a revolving head carried by the power shaft, and the said head forming the bottom of a chamber in the upper part of the cover, a. gear fiXedly held onathecovers in arial alinement with the power shaft, a pulverizing element carried on the revolving head, said element including crushing members pendent from the re' volving head that engage the bottom of the pan, a shaft that extends up into the chamber in the cover, a traveler gear on the shaft that meshes with the liXedly held gear, another gear o-n the ksaid last mentioned shaft, and a driver gear on the central shaft that engages the said other gear, the several vgears being located within the chamber in the cover, and means for actuating the power shaft. l j

3.l In a pulverizing mill; a pan, and an inverted dish shaped cover mounted thereon, a central hollow post in the pan, the cover having an internal annular bearing flange, a power driven shaft mounted in the hollow post, a rotary head plate carried by the shaft, said plate having a peripheral bearing portion for engaging the internal bearing on the cover, said rotary head plate dividing the space within the cover and pan into an upper and a lower chamber, a vertical spider fame mounted inthe revolving head to move therewith, a pulverizing element, which includes crushing members held and operable within the lower or pan chamber, andan actuating shaft that carries the pulverizing elements journaled in the revolving head and the spider frame, va gear fiXedly held on the under side of the cover in axial alinement with the power driven shaft, a driving gear on the upper end of the said shaft, a traveler gear on the pulverizing element carrying shaft that meshes with the fiXedly held gear, a second gear on the last mentioned shaft that meshes with the driver gear on the power driven shaft, the several power transmission gears being located within the upper or cover chamber.

4. In a pulverizing mill of the character stated; a pan having outlets in its side wall, a feed hopper at one side, a collecting trough externally of the base of the pan that surrounds the pan and inclines downwardly to a discharging outlet, screen frames removably held over the openings in the side of the pan, splash. plates pendently and removably hooked over the screen frames, means for removably securing the screen frames and holding the splash plates against lateral displacement and pulverizing mechanism mounted within the pan and including crushing members that travel over the bottom of the pan and means mounted on the pan Vfor imparting movement to the said crushingv members.

5. In a pulverizing mill, a working element which comprises in combination with the rotatable gear shaft, a driving yoke, a roller head, said roller head and said driving yoke including interprojecting portions, connections between said roller head and said driving yoke, roller spindles carried by said head, crushing rollers mounted on said spindles, said crushing rollers including roller elements proper, roller bearings between said roller elements proper and said spindles, ball thrust bearings for said rollers, and means for incasing said bearings to prevent access of the materials being crushed.

6. In a pulverizing machine, a bowl, a post projecting upwardly in said bowl, a vertical shaft projecting through said post,

.bearings for said shaft, a cover for said bowl inclosing a gear chamber above the bowl, said cover having an annular bearing flange, a rotatable plate mounted on said shaft beneath said flange and having a bearing flange to coperate with said cover bearing ange, bearings in said plate, roller head shafts mounted in said plate bearings, roller carrying heads mounted on said roller head shafts within the bowl, and a planetary transmission mounted within the cover above said plate and coperatively connecting said shafts.

7. In a pulverizing machine, a bowl, a post projecting upwardly in said bowl, a vertical shaft projecting through said post, bearings for said shaft, a cover yfor said bowl inclosing a gear chamber above the bowl, said cover having an annular bearing fiange, a rotatable plate mounted on said shaft beneath said liange and having a bearing flange to coperate with said cover bearing flange, bearings in said plate, roller head shafts mounted in said plate bearings, crushing roller carrying heads mounted on said roller head shafts within the bowl, a planetary transmission mechanism mounted within the cover above said plate and coperatively connecting said shafts, said cover having an opening in its top, and a removable cap held over said opening whereby access may be had to said gearing without removing said cover from said bowl.

8. In a mill, a bowl, a cover for said bowl, said bowl having entrant and discharge openings, said cover projecting above said bowl to form a chamber, a bearing flange carried by said cover adjacent to said bowl, a rotatable plate having bearing contact with said flange beneath the same to form a. closure, a vertical shaft projecting upwardly through said bowl and into said cover to which shaft said plate is secured, roller head shafts rotatably mounted on said plate to project through the same, working members carried by said last named shafts within the bowl, and a planetary transmission gear mechanism connecting said lirst mentioned shaft with said second mentioned shaft and located wholly within the cover chamber above said plate, and means for driving said first mentioned shaft.

9. In a mill, a bowl, a cover for said bowl,- said bowl having entrant and discharge openings, said cover projecting above said bowl to form a chamber, a bear ing flange carried by said cover adjacent to said bowl, a rotatable plate having bearing contact with said flange beneath the same to form a closure, a vertical shaft projecting upwardly through said bowl and into said cover to which shaft said plate is secured, roller head shafts rotatably mounted on said plate to project through the same, working members carried by said last named shafts within the bowl, and a planetary transmission gear mechanism connecting said first mentioned shaft with said second mentioned shaft and located wholly within the cover chamber above said plate, means for driving said irst mentioned shaft, said cover having its top opened and a removable cap secured over said top opening whereby access may be had to said cover without removing said cover from said bowl.

10. In a mill of the character described, a pan having outlets in its side walls, formed with side guides, screens for said outlets movable in the guides, pendent splash plates including angled top portions to hook over the top of the screens, and a single means for holding the splash plates against lateral movement upon their respective screens and the screens locked within their respective guides.

HENRY URSON PRINDLE.

Witnesses:

TOM ConnTRIGI-rr, BLANCHE HADLEY STRONG.

Copies of` this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. C. 

